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ADC conversion precision

Question asked by Pau Vilanova on May 31, 2019
Latest reply on Jun 4, 2019 by Jing Pan

Hi, I'm working with the MKE04 with the ADC conversion. I'm reading  the signal from a linear potentiometer and I'm trying to differ 100 positions, in this case (0-5v).

The thing is that the ADC conversion is not stable, for example working with 8 bits I get +-4 conversion value when the potentiometer is not moving. I've tried with everything that I know of ( hardware filtering, software average) and I could not get beyond that -+4 value. Then I tried with other board that we have the MKV11Z64 having the vrefh at 5v and the conversion is far better, with just 1 value of error.

The thing is that I cannot use the MKV11 for this project because we are out of space we would like to use a tsop16 micro at best, so I have two questions.

Are there any tsop 16 or less microcontrolers specialised on ADC?

If not, is there any way to improve the adc conversion of my uc?

 

Thanks

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